Nb-iot module N20 three-mode GPRS data transmission IoT low-power wireless communication DTU module

Place of Origin:
Guangdong, China (Mainland)
Brand Name:
Model Number:
Product name:
TB88N20 nb-iot module
GNSS Function:
68-Pin LCC
Power supply:
3.3-4.3V TYP:3.8V
N.W G.W:
Selling Units:
Multiple of
Volume per batch:
3 cm
Gross weight per batch:
0.035 kg
Package Type:
Each in a bag, In a Carton Box
Lead Time:
Quantity(Piece) 1 – 1000 >1000
Est. Time(day) 15 To be negotiated

Product Description

N20 is a high-performance low-consumption module developed on Qualcomm platform. It supports NB-IoT, eMTC, and EGPRS. With rich hardware interfaces, this module facilitates further development. It adopts LCC package which is perfect for mass production. The compact size can meet most requirements for small communications modules. N20 is well applicable to low-rate low-power consumption IoT terminals, such as water and gas metering and sharing devices. 




  • Embedded A7 processor

  • GNSS positioning, NB-IoT network modes

  • Optional audio

  • Industrial-grade performance

  • Compact design

  • Best choice for energy meter reading, smart parking, asset tracking, environmental monitoring and other fields

     Low speed, low power consumption, extended coverage

Technical Parameter

Item  Description & Technical Parameter
Product Parameter Brand TOPBAND
Packaging Type 68 PIN LCC Package, easy to solder
Size (mm) 25.8*23.8*2.8 (mm)
Band Full-duplex / Semi-deplex,
Weight 3.5g
Module solution MCU Core ARM-CORTEX-A7
Band 1.3GHZ 256Kb L2 Cache
RAM/ROM 512Mb/1Gb   (1Gb/2Gb optional)
Transmission speed EGSM900:+33dBm (Power Class 4)
DCS1800:+30dBm (Power Class 4)
EDGE900MHz:+27dBm (Power Class E2)
EDGE1800MHz:+26dBm (Power Class E2)
LTE:+23dBm(Power Class 3)
Data Transmission Transmission speed GPRS: Max 85.6Kbps (DL/UL)
EDGE: Max 236.8Kbps (DL/UL)
LTE Cat M1: 300kbps (DL/375Kbps (UL)
LTE Cat NB1: 32kbps (DL)/72Kbps (UL)
Electrical parameters Power Supply Volage 3.3-4.3V, Typical V. 3.8V
Standby Current LTE Cat M1: 1.7mA(@DRX cycle=1.28s)
LTE Cat NB1: 2.7mA(@DRX cycle=1.28s)
Peripheral interface Antenna connection characteristic 2G/4G Antenna, GNSS Antenna,
50Ω Characteristic impedance
UART 2*UART interface, Max speed upto 4 Mbps
UIM 1*UIM interface can be adaptive 1.8v/2.85v
USB 1* USB 2.0
ADC 2*15-bit ADC, Voltage Detection range:0.1-1.7V
SPI 1*SPI, Max speed upto 50mHz (only support Maste Mode)
I2C 1*I2C, can control external sensor
PCM 1*PCM, for digital audio transmission
SDIO 1*SDIO, Can control 4-way WLAN interface
Working Environment Temperature range ≤ 15W
Humidity non-condensation, relative humidity<95%
Certificates CCC, CTA, SRRC, CE, FCC,
Recommended Application field Intelligent water management, Wireless meter reading terminal,
Shared bicycle / electric car / umbrella, smart farm, Urban manhole cover,
IoT communication terminal




  • Remote meter reading

  • Smart city
  • Smart fire alarm system
  • Smart street lighting system
  • Smart parking
  • Smart manhole cover
  • Asset and logistics tracking,
  • Environmental and agricultural monitoring



Shenzhen Topband Co., Ltd

was registered in the “China Silicon Valley” Shenzhen Hi-tech Industrial Park in 1996
After years of rapid development, Topband takes intelligent control as the core technology and becomes a leading supplier in intelligent control solutions. Our products cover household appliances intelligent control, HID, high-efficient lighting, motor, power, security, industrial automation and digital electronics, with the business of dozens of countries all around the world.

Topband’s smart control products cover home application, medical apparatus and instruments, industry control, power tool, home care, refrigerator, washing machine and bathroom accessory, driving power, and other relative intelligent control product. Topband has strong in-house R&D team and professional automatic production line. It also has a perfect after-sales service system, providing the best intelligent control solutions and products, and JDM/ODM/EMS services.

Topband has got CNAS laboratory certification and has passed TS16949:2009/ISO9001:2008 Quality Management System, ISO14001:2004 Environmental Management System, OHSAS18001:2007 Occupational Health and Safety Management System Certification. We have utilized 6 SIGMA, FMEA, and other international advanced management philosophy to promote our management. Topband has already be provided with RoHS compliance delectability and complete RoHS guarantee capability.

In 2007, it was listed in Shenzhen Stock Exchange (the stock code as 002139). As a company with high sense of social responsibility, it is always a faithful companion of enterprises and consumers.

Topband is a Hi-tech enterprise and Shenzhen Stock Exchange public company. At present, Topband has more than 5000 staff and covers an area of 75,000 square meters. There are three plants located in Shenzhen, Hangzhou, Huizhou and Chongqing. In 2015, it has established Topband Indian Company in India.

Topband keeps with innovation; we have committed ourselves to make people’s lives more comfortable and efficient. We and our companions are working hard at making technology progress to let people enjoy the changes of new technology.

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